John m



` To all whom tt ma/y concern naar eine JOi-I'NfM. BRYAN, TOF LINCOLN, CALIFORNIA.

'Latem 'faam No. 89,734, .met May 4., 1869. l

flhe Schedule referred to in these Letters Patent and making pari: of the same.

Be it known that I, JOHN M. BRYAN, of Lincoln,

'county of Placer, and vState of vGalifo'rnia, have invented a Self-Discharging Blanket'Ooncentrator;I and- I do hereby declare the following description and a'ccompauyingdrawings are .sufiicient to enable any personskilled in'theart lor science to which it most nearlyiappertains, to make and use my said invention or improvement without further invention or experi# ment.

My invention relates toan improved concentrator lfor separating sulphurets from 'the pulp or tailings after ithaspassed through the batteries and It consists infarrangiug a broad canvas belt on rollers, so as to form an endless belt, and placing across Vthe top ofthe blanket a third roller, which causes` a depression in the top of the blanket.

The rollers are arranged on a swinging frame, and are oiilliirated by a ratchet and pawl.

The pawl is caused' to engage the teeth of the ratchet by the swinging fof the frame. i

` one v side, and passes across it, leaving the sulphu'rets clingingto the canvas, whence they-are deposited ina trough beneath. i

lo more fully illustrate and explain my invention, reference is had to the accompanying drawings, form ing a part of this speciicatiomof which` 'Figure 1 isa side elevation 'f Figure 2 is a plan. f'

Similar letters of reference, in each of the figures,

' indicate like parts.

Inside of a suitable frame, A, Iplace a square frame, B, and yswing it fromjthe upper timbers G C, `by means of rod'sand'links a a, or other suitable device.

The frame B is adjustablev by means of screws on the upper part 'of the rods a, and may be raised and lowered by means of nuts c c.

lassing across the frame B, and having their bear-V ings in the Opposite ends ofthe frame, are rollers D E.

The roller D is much 'larger than E, and has 'atcached to its journal at one end, the ratchet-wheel F.'

Passing around these two rollers, so as to form an endless belt', is a wide piece of canvas, L, made of two thicknesses doubled and quilted together.

The .two ends of the Vcanvas are joinedV by crossstitches, so that the canvas will present a smooth sur face.

Passing across the frame above the canvas belt, and unal-"thc large rollei" D, is a small roller, G, which 'bears down upon the canvas, causing it to sag on top.

A bar, N, is attached loosely at one end tothe timber J on the ii'ame'A, and the opposite end is pivotcd to the swinging frame B near the ratchet-wheel I.

A pavvl, @,is pivoted to this bar, and falls upon the ratchet, which, as the frame 'B swings back and forth, causes the roller D to revolve, and thus carry around the canvas.

The roller E is adjustable by means of a screw, g, by which the'tension of thebelt maybe increased or diminished as desired.

The end oof the roller Gr lis bevelled, so as to cause the canvas to turn up at the point Where the pulp is introduced, and prevent it from being discharged on the wrong side.

The'operation ofthe machine is as follows, viz:

The frame B is. iiiist adjusted by means of the nut's c c, so that the side of the belt on which the'pulp is fed will be higher than theopposite side.

The machine is then set in motion, and pulp introduced upon the belt.

The pulp -by its gravity falls to the lowest part vof Y the sag next to the roller G, and passes across the canvas, while the snlphurets, owing to their greater spevcilc gravity, sinkt'o 'thebOttOm and cling to the'canvas belt, .and are carried by it over the roller E, and are washed oli' by the Water ina.ta'nk or trough, K,

`directly beneath, through whichthe canvas passes,

While the refuse matter is discharged at the opposite lside of thebelt through the spout P.

The frame B may be operated by a crank, or other suitable device.

1t is important that 'the canvas be of a uniforml thickness, as upon the true movements of the belt depends in-,a great degree the proper separation of Y 2. The frame B, rollers D, E, and G, and swinging bar N, in combination with the ratchet-Wheel `F and pawl e,.the whole arranged to' operate substantially as and for the purpose herein described.

' 3. Passing the pnlps across a revolving canvas belt from side to side, substantially as described.

lIn witness whereo have hereunto set my hand and seal.

f JOHN M. BRYAN. '[L.s.]

Vitnesses:

J. L. BOONE, GEO. H. STRONG. 

